Caisil

Caisil was a medieval Irish kingdom which existed from the 5th century to 1172, with Cashel in present-day County Tipperary serving as its capital. In the 5th century, the Eoganachta dynasty established Cashel as its capital, and many kings of Munster reigned from Caisil; in 977, the usurper Brian Boru became the first non-Eoganacht king of Caisil and Munster in over 500 years. In 1101, his grandson gave the place to the Bishop of Limerick to prevent it from falling into the MacCarthy dynasty's hands, ending Caisil's status as a kingdom.